/* ==========================================================================
   Image Studio - Crop & Compose Canvas Styles
   ========================================================================== */

/* Main Studio Layout Container */
.studio-container {
  display: grid;
  grid-template-columns: 290px 1fr 310px;
  grid-template-rows: 100%;
  height: calc(100vh - 61px);
  overflow: hidden;
  position: relative;
  background-color: var(--bg-primary);
}

/* Common Sidebar Styles */
.studio-sidebar {
  background-color: var(--bg-surface);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  z-index: 20;
}

.left-sidebar {
  border-right: 1px solid var(--border-subtle);
}

.right-sidebar {
  border-left: 1px solid var(--border-subtle);
}

/* Sidebar Tab Headers */
.sidebar-tab-group {
  display: flex;
  background-color: var(--bg-surface-elevated);
  border-bottom: 1px solid var(--border-subtle);
  padding: 4px;
  gap: 4px;
}

.sidebar-tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 0.5rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.sidebar-tab:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.05);
}

.sidebar-tab.active {
  color: #ffffff;
  background-color: var(--accent-primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

html.light-theme .sidebar-tab.active {
  background-color: var(--accent-primary);
  color: #ffffff;
}

/* Sidebar Scrollable Body */
.sidebar-scroll-content {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Section Header */
.section-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.section-caption {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.section-badge {
  font-size: 0.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-surface-elevated);
  color: var(--accent-primary);
  border: 1px solid var(--border-subtle);
}

/* Basic Shapes Grid */
.shape-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.shape-card-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.65rem 0.4rem;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.shape-card-btn:hover {
  color: var(--text-main);
  border-color: var(--accent-primary);
  background-color: var(--bg-surface-hover);
  transform: translateY(-1px);
}

.shape-card-btn svg {
  width: 28px;
  height: 28px;
  stroke: currentColor;
  fill: rgba(59, 130, 246, 0.15);
}

.shape-card-btn span {
  font-size: 0.72rem;
  font-weight: 500;
}

/* 26 Letters Stencil Grid */
.letter-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.35rem;
}

.letter-badge-btn {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.letter-badge-btn:hover {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
  transform: scale(1.08);
}

/* Local Vector Models (IndexedDB) */
.local-model-btn {
  grid-column: span 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
  min-height: 64px;
  padding: 0.3rem 0.2rem;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.local-model-btn:hover {
  border-color: #a855f7;
  transform: scale(1.04);
}

.local-model-btn svg {
  width: 100%;
  height: 34px;
}

.local-model-btn svg path {
  fill: rgba(168, 85, 247, 0.25);
  stroke: #a855f7;
  stroke-width: 1.5;
}

.local-model-btn span {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.68rem;
  color: var(--text-muted);
}

.link-btn-danger {
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.1rem 0.3rem;
  font-size: 0.72rem;
  color: var(--accent-red);
  cursor: pointer;
}

.link-btn-danger:hover {
  text-decoration: underline;
}

.local-empty-hint {
  margin: 0.35rem 0 0 0;
}

/* Local Model Name Dialog */
.name-dialog-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background-color: rgba(0, 0, 0, 0.55);
}

.name-dialog {
  width: 100%;
  max-width: 320px;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1rem 1.1rem 1.1rem 1.1rem;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md, 10px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

.name-dialog-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
}

.name-dialog-input {
  width: 100%;
  box-sizing: border-box;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.85rem;
  padding: 0.5rem 0.6rem;
  outline: none;
}

.name-dialog-input:focus {
  border-color: var(--accent-primary);
}

.name-dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.2rem;
}

.name-dialog-actions .btn {
  padding: 0.45rem 1.1rem;
  font-size: 0.82rem;
}

.btn-block {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.55rem 0.85rem;
  font-size: 0.82rem;
}

.btn-icon:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.btn-icon:disabled:hover {
  color: var(--text-muted);
  background-color: var(--bg-surface);
  border-color: var(--border-subtle);
}

.btn-danger {
  background-color: rgba(239, 68, 68, 0.12);
  color: var(--accent-red);
  border: 1px solid rgba(239, 68, 68, 0.25);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-danger:hover {
  background-color: var(--accent-red);
  color: #ffffff;
}

/* Layer Management List */
.layer-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-height: 120px;
}

.layer-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.65rem;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.layer-item:hover {
  border-color: var(--border-hover);
  background-color: var(--bg-surface-hover);
}

.layer-item.active {
  border-color: var(--accent-primary);
  background-color: rgba(59, 130, 246, 0.12);
}

.layer-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow: hidden;
  flex: 1;
}

.layer-icon {
  width: 18px;
  height: 18px;
  color: var(--accent-primary);
  flex-shrink: 0;
}

.layer-name {
  font-size: 0.78rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.layer-controls {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.layer-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 0.2rem;
  border-radius: 4px;
}

.layer-btn:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.08);
}

/* Center Canvas Viewport */
.canvas-viewport-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
  background-color: #060911;
  overflow: hidden;
  user-select: none;
}

html.light-theme .canvas-viewport-wrapper {
  background-color: #e2e8f0;
}

/* Ruler Elements */
.ruler-corner {
  position: absolute;
  top: 0;
  left: 0;
  width: 24px;
  height: 24px;
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--text-dim);
  cursor: pointer;
  z-index: 15;
  transition: color 0.15s ease;
}

.ruler-corner:hover {
  color: var(--accent-primary);
  background-color: var(--bg-surface-hover);
}

.ruler-x-wrapper {
  position: absolute;
  top: 0;
  left: 24px;
  right: 0;
  height: 24px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 10;
  overflow: hidden;
}

.ruler-y-wrapper {
  position: absolute;
  top: 24px;
  left: 0;
  bottom: 0;
  width: 24px;
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  z-index: 10;
  overflow: hidden;
}

.ruler-canvas {
  display: block;
}

/* Canvas Stage */
.canvas-stage {
  position: absolute;
  top: 24px;
  left: 24px;
  right: 0;
  bottom: 0;
  overflow: hidden;
  touch-action: none; /* Two-finger pan / pinch zoom are handled in JS, keep the browser from taking over */
  /* Photoshop/Figma-like transparent checkerboard */
  background-color: #0d121f;
  background-image: 
    linear-gradient(45deg, #131929 25%, transparent 25%), 
    linear-gradient(-45deg, #131929 25%, transparent 25%), 
    linear-gradient(45deg, transparent 75%, #131929 75%), 
    linear-gradient(-45deg, transparent 75%, #131929 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

html.light-theme .canvas-stage {
  background-color: #f1f5f9;
  background-image: 
    linear-gradient(45deg, #e2e8f0 25%, transparent 25%), 
    linear-gradient(-45deg, #e2e8f0 25%, transparent 25%), 
    linear-gradient(45deg, transparent 75%, #e2e8f0 75%), 
    linear-gradient(-45deg, transparent 75%, #e2e8f0 75%);
}

/* Floating Viewport Toolbar */
.floating-toolbar {
  position: absolute;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background-color: rgba(17, 24, 39, 0.92);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 0.35rem 0.65rem;
  box-shadow: var(--shadow-xl);
  z-index: 30;
}

html.light-theme .floating-toolbar {
  background-color: rgba(255, 255, 255, 0.92);
}

.tool-group {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.tool-divider {
  width: 1px;
  height: 18px;
  background-color: var(--border-subtle);
  margin: 0 0.2rem;
}

.tool-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
}

.tool-btn:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.1);
}

.tool-btn.active {
  color: #ffffff;
  background-color: var(--accent-primary);
}

.zoom-display-badge {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-main);
  font-family: var(--font-mono);
  padding: 0.2rem 0.5rem;
  min-width: 52px;
  text-align: center;
  user-select: none;
}

/* Inspector Controls in Right Sidebar */
.inspector-card {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.inspector-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.coord-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 1;
}

.coord-input {
  width: 100%;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.35rem 0.4rem 0.35rem 1.4rem;
}

.coord-wrapper {
  position: relative;
  flex: 1;
}

.coord-prefix {
  position: absolute;
  left: 0.4rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-dim);
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}

.coord-input.has-2char-prefix {
  padding-left: 2.35rem;
}

.lock-ratio-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
}

.lock-ratio-btn.active {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background-color: rgba(59, 130, 246, 0.12);
}

/* Layer Arrange Quick Grid */
.arrange-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.35rem;
}

.arrange-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 0;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
}

.arrange-btn:hover {
  color: var(--text-main);
  border-color: var(--accent-primary);
}

/* Export Bounding Box Stats Card */
.export-stats-card {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(16, 185, 129, 0.08));
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.export-stat-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
}

.export-stat-row .stat-title {
  color: var(--text-muted);
}

.export-stat-row .stat-value {
  color: var(--text-main);
  font-family: var(--font-mono);
  font-weight: 600;
}

.export-stat-row .stat-value.highlight {
  color: #38bdf8;
  font-size: 0.85rem;
}

/* Empty Canvas Hint */
.empty-canvas-hint {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: var(--text-dim);
  pointer-events: none;
  text-align: center;
  z-index: 5;
  transition: opacity 0.2s ease;
}

.empty-canvas-hint.hidden {
  opacity: 0;
}

/* Responsive Drawer Navigation (AGENTS.md 4.9.1) */
.mobile-sidebar-toggle {
  display: none;
  position: absolute;
  top: 36px;
  z-index: 35;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 0.4rem 0.75rem;
  font-size: 0.75rem;
  color: var(--text-main);
  box-shadow: var(--shadow-md);
  cursor: pointer;
}

.mobile-toggle-left {
  left: 36px;
}

.mobile-toggle-right {
  right: 12px;
}

/* Mobile Drawer Backdrop */
.drawer-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 45;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  opacity: 1;
  visibility: visible;
}

.drawer-backdrop.hidden {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

.hidden {
  display: none !important;
}

@media (max-width: 1024px) {
  .studio-container {
    display: flex;
    flex-direction: column;
    width: 100vw;
    max-width: 100%;
    height: calc(100vh - 61px);
    overflow: hidden;
    position: relative;
  }

  .canvas-viewport-wrapper {
    flex: 1 1 auto;
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
  }

  .left-sidebar {
    position: fixed;
    top: 61px;
    left: 0;
    width: 320px;
    max-width: 88vw;
    height: calc(100vh - 61px);
    transform: translateX(-100%);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.25s ease;
    box-shadow: var(--shadow-xl);
    z-index: 50;
    visibility: hidden;
  }

  .left-sidebar.drawer-open {
    transform: translateX(0);
    visibility: visible;
  }

  .right-sidebar {
    position: fixed;
    top: 61px;
    right: 0;
    width: 330px;
    max-width: 88vw;
    height: calc(100vh - 61px);
    transform: translateX(100%);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.25s ease;
    box-shadow: var(--shadow-xl);
    z-index: 50;
    visibility: hidden;
  }

  .right-sidebar.drawer-open {
    transform: translateX(0);
    visibility: visible;
  }

  .mobile-sidebar-toggle {
    display: flex;
    align-items: center;
    gap: 0.35rem;
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding: 0.5rem 0.75rem;
    gap: 0.35rem;
  }

  .brand-wrapper {
    gap: 0.35rem;
  }

  .brand-icon {
    width: 28px;
    height: 28px;
  }

  .brand-title {
    font-size: 0.95rem;
  }

  .brand-tag {
    display: none;
  }

  .header-actions {
    gap: 0.25rem;
  }

  .header-actions .btn {
    padding: 0.35rem 0.55rem;
  }

  .header-actions .btn span {
    display: none;
  }

  .floating-toolbar {
    bottom: 0.6rem;
    padding: 0.2rem 0.4rem;
    gap: 0.15rem;
    max-width: calc(100vw - 1rem);
    overflow-x: auto;
  }

  .tool-btn {
    width: 26px;
    height: 26px;
    flex-shrink: 0;
  }

  .tool-btn svg {
    width: 14px;
    height: 14px;
  }

  .tool-divider {
    height: 12px;
    margin: 0 0.05rem;
    flex-shrink: 0;
  }

  .zoom-display-badge {
    font-size: 0.7rem;
    padding: 0.1rem 0.3rem;
    min-width: 42px;
    flex-shrink: 0;
  }
}

@media (max-width: 640px) {
  .nav-tab {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    gap: 0.25rem;
  }
  .brand-title {
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .brand-title {
    display: none;
  }
}